Specific gravity: 6.56
Hardness: 2 to 3
Colour: White to bright yellow, or greyish-green, grey; light yellow to colourless in transmitted light
Solubility: Readily soluble in acids with effervescence
Beyerite is a rare secondary mineral in hydrothermal mineral deposits and
granite pegmatites, formed by alteration of
bismuth-bearing sulfides and sulphosalts and associated with
The type locality is Schneeberg, Erzgebirge, Saxony, Germany.
In three pegmatites in south-central Colorado, USA (Mica Lode and School Section deposits, Fremont county, and Meyers Ranch body, Park county), beyerite is inter-grown with bismutite. These minerals are supergene alterations of late, hydrothermal, metallic minerals, native bismuth, bismuthinite, and various bismuth-bearing sulphosalts (American Mineralogist.32.660).
At the Emmons pegmatite, Greenwood, Oxford county, Maine, USA, beyerite has been observed rimming tiny grains of native bismuth. The Emmons pegmatite is an example of a highly evolved boron-lithium-cesium-tantalum enriched pegmatite (R&M 94.6.505).tantalum
Back to Minerals